3°8 
AMERICAN JOURNAL OF BOTANY 
[Vol. io, 
46. V. costata Rusby, Mem. Torrey Bot. Club 6 : 53. 1896. 
Between Mapiri and Tipuani, Bang 14/2 (type). 
47. V. cordiaefolia HBK., Nov. Gen. & Sp. 4: 38. 1818. 
V. patuliflora Rusby, Bull. N. Y. Bot. Gard. 4: 376. 1907. 
This common species presents a considerable range of variation, but is 
nevertheless readily recognizable and constant to the characters set forth 
in the key. 
Coroico, Yungas, Bang 2396 (type of V. patuliflora ), Buchtien 3931, 
3930; Antahuacana, Buchtien 2236; San Carlos, near Mapiri, Buchtien 
1532 , 1534 , 2462. 
Subsection 3/ 
Leaves auriculate-clasping at the base. 
Involucre 5 mm. high, its scales few, loosely imbricate in few 
series, narrowly lanceolate, sharply acute; leaves narrowly 
elliptic, toothed above the middle to the short-acuminate tip, 
abruptly constricted below the middle, nearly glabrous 
beneath. 
Involucre 13 mm. high, its scales numerous, closely imbricate in 
several series, oblong, the inner obtuse or minutely apiculate; 
leaves narrowly oblong, 15-20 cm. long, sharply toothed, 
densely pubescent beneath. 
Leaves not auriculate-clasping. 
Involucral scales all acute, or the inner lance-subulate, purple; 
leaves ovate, strictly entire, on petioles 2-3 mm. long. 
Inner involucral scales blunt, the outer acute to cuspidate, green, 
or with purple tips; leaves not ovate. 
Leaves narrowly oblong; involucral scales in relatively few 
series. 
Leaves broadly oblong to elliptic; involucral scales in 
numerous series. 
48. V. prenanthoides. 
49. V. auriculata. 
50. V. laurifolia. 
51. V. canaminina. 
52. V. fulta. 
48. V. prenanthoides n. sp. 
Stems shrubby, 2 m. high, the younger portions glabrous, prominently 
angled; leaves closely sessile, auriculate-clasping, elliptic, abruptly short- 
acuminate, sharply serrate above the middle, entire and conspicuously 
constricted below the middle, glabrous above, minutely puberulent with 
short conic hairs beneath, pinnately veined; inflorescence large, paniculate, 
freely branched, the cymes short, with few heads; heads about 18-flowered, 
sessile or on peduncles up to 3 cm. long; involucre broadly obconic, 6 mm. 
high, its scales irregular in length, loosely imbricate below, erect, few in 
number, not fully concealing the achenes, straw-colored or dull brown, 
lanceolate, glabrous, the outer acuminate, the inner sharply acute, achenes 
prominently ribbed, short-hirsute; pappus straw-colored, the bristles fragile, 
5 mm. long, the paleae 0.5 mm. long. 
Rurrenabaque, alt. 1,000 ft., Rusby 756 (type, in the herbarium of the 
New York Botanical Garden), Rusby 757. 
The leaves are closely similar in outline and serration to those of Aster 
